I have recently got BB out to our home. Maybe we are one of the lucky ones, because I could see an improvement on the first day. We do use a collar that have a piece of chain in, but the trainer showed us how to just pull it to make the grrrts sound, but not to choke the dog. I do use a water bottle with the BAH when I do not get reaction immediately. So far I am happy. Marthy is coming out to our house tomorrow again as I requested assistance on chewing. In the mean time he has recommended crib stop, which seems to work. I will keep you up to date on how Bark Busters is doing.